Glass beveling and polishijtg apparatus



F. A. ANTONCICH. GLASS BEVELING AND POLlSHiNG APPARATUS.

APPHCAI'ION FlLEb DEC.20. I916- Patentul J uly 15, 1919.

4 SHEETSSHEET I.

F. A. ANTONCICH GLASS BEVELAING AND POLISHING APPARATUS.

APPLICATION FILED DEC.20. [9!6.

Patented July 15, 1919.

4 SHEETS-SHEET 2.

F. A. ANTONCICH. GLASS BEYELING AND POLISHING APPARATUS.

APPLICATION FILED [156.20. I916.

. Patented July 15, 1919.

4 SHEETS-SHEET 3.

F. A. ANTONCICH.

GLASS BEVELING AND POLISHING APPARATUS,

' APPLICATION men DEC.20. l9l6. 1,309,792. Patented July 10, 1919.

4 SHEETS-SHEET 4.

' any suitable source.

- FREDERICK A; .ANTGNCICH, OF BROOKLYN, NEW YORK GLASS IBEVELING AND POLISHING APPARATUS.

Specification of I etters Patent. 4 Patgntgd July 15 1919,

Application. filed December '20, 1916. Serial No. 137,967.

To all whom it may conccrp:

Be it known that I, FREDERICK A. AN'roN- own, a subject of the Emperor of Austria,

and a resident of the borough of Brooklyn,

county of Kings, State of New York. have invented certain new and useful Improvements in Glass Beveling and Polishing Ap-, paratus, of which the following is a specification.

My invention relates to apparatus for beveling glass for mirrors, furniture tops and any other glass articles where a beveled edge is desired. It may also be used for grinding and polishing the surface or edges of glass or similar material.

In the drawings, in which I have shown one form of my invention,

Figure l is a top'plan view;

Fig. 2 is an end elevation of the grinding apparatus, looking from the right of Fig. 1

Fig. 3 is a side elevation of Fig. 2;

Fig. 4 is an end elevation of i 1 glasssupporting apparatus, looking from the right of Fig. 1;

Fig. 5 is a side elevation of Fig. 1; and

Fig. 6 is a detail view of the mirror-support shown in section.

For convenience, I will describe first the mirror-supporting and rotating device, and then the grinding apparatus.

1 is a frame in which are located four eccentrics 2, 2, two arranged near the front or the mirror-end of the frame and the other two toward'the rear. These eccentrics are mounted on shafts 3, 3 1 is a shaft mounted in the upper part of the framework upon which is mounted a belt-drum 5, so that the shaft is .freely movable longitudinally independent of the drum, but held rotatable therewith by the key 5. 5 is rotated by a belt transmitting power from Fixedly mounted on shaft 4 is a sprocket 6 carryingsprocket chain 7 which engageswith sprocket-wheel ,8 mounted on shaft 3,"sl1bwn to the left of Fig. 4, so that as the shaft 4 is rotated by the belt on drum 5 from any suitable source of supply, gear 6 transmits the motion.

through sprocket'chain 7, gear 8 to shaft 3. Fixedly mounted on the shaft 3 is a sprocket 9 carrying a chain 10 engaging with sprocket 11, on shaft 3, so that the rotation of shaft 3 is transmitted to 3 and they rotate at the same speed.

In the frame orsupport 1 is a horizontal bearing 12 for the shaft 13. The eccentric cams 2, 2 are arranged so that by their rotation, the shaft 13 is given a reciprocating motion in the bearings 12, 12, so as to move the shaft from the right to the left, or vice versa.

Itwill be noted in Fig. 1 that the eccen .any slack in the sprocket chain 15, I provide an arm 17 mounted loosely on shaft 4 which carries in its lower end two rollers 18, 18, movable toward and away from each other and held apart'by'a spring 19. These rollers engage sprocket chain 15, and by expansion of the spring 19, take up any looseness-in the chain 15 so as to keep same taut irrespective of the distance between the centers of shafts 41 and 18.

On the end of shaft13 is a chuck or support 20 to support the glass or mirror to be beveled. This chuck or support, has, on the glass or mirror-holding side, a sunken portion 21' around which isarranged a felt, or other suitable support 22, against which the glass is held. 23 is a chamber in which is mounted a piston 21 having a handle 25 so that with the piston as shown in Fig. 6, if the mirror or glass 26 is placed and held against the support, and the handle 25 of the piston pulled upon so as to drawjthe piston out through chamber 23, a vacuum is created in the portion 21 which holds the mirror in place on thesup port.

The operation of this portion of the apparatus is as follows: 1 v g Power being transmitted through the belt to. the drum 5, the shaft 1 isrotated. .The

motion of shaft 4 is transniitta'g i; through sprocket 6 to shaft 3 by sprocket chain 7 and sprocket wheel 8. Shaft 3ft} is rotated by sprocket 9, sprocket chain 10 and sprocket 11. The rotation of shaft-s 3 and 3, rotat-.

. this 4 sprocket wheel '14 fixed on shaft 13. Rotation of shaft rotates the chuck or sup-- port 20. p v p It will be noted thatthe rotating and re ciprocating motion given to shaft 13 tends to keep the edge or surface, of the glass 26 to be beveled or ground, substantially at the same point all the time.

I willnow describe the grinding and polishing operationof the apparatus.

27 is a frame mounted on support 27 so as to be revolved on tracks 29 on support 27 and tracks 30 on the foundation. In the frame '27 are mounted four eccentrics 28, I-W0 on shaft 29 and two on shaft 30. 31 is a bearing in which is mounted a shaft 32 so as rmit shaft 32 to have a reci n'ocating ve motion. rar= i that their peripheries engage with 32 to raise and lower same in the bearing- 31;, Power for the rotation of shafts 0 is transmitted from any suitabl Pp y to drum 33, shaft 58,

sprocket 34,

35 to sh ft shaft 37 to sprocket wheel 36, sprocket wheel 36 to sprocket 41 on shaft is slightly inclined-so that the grinding sur- 'face'is at a slight angle to the beveled line of the. mirror so as to cause the grinding stone to contact with the mirror at only one point;

Asthe oval mirror rotates, there are four points at which it would tend to pull away from the grinding stone and to compensate for this, I the support 27 is mounted on tracks are mounted. These eccentrics 49, 49

wheels or rollers 47 mounted on tracks 48, So as to be moved back and forth by the eccentric cams 49, 49, mounted in supports 50, 50 fixed to'the foundation upon which the are mounted on shafts 51 and 52, respectively, shaft 51 having mounted on it a drum 53 operated by a belt from any suitable source of power. Also mounted on the shaft 51 are sprocket-wheels 54, 54 which engage with sprocket chains fastened to sprocket wheels 55, 55 to rotate shaft 52.

By the use of sprocket chains it will be observed that the cams" 49, 49 are operated in unison and at the saine speed, so as to move the support-28 back and forth in the tracks 48, 1 I

To compensate for the slight difference between the centei of the shafts37 and 32 The eccentrics are so ars rocket chain 35 to sprocket and the center of the shafts 37 and 29, I provide suitable compensating devices 56 and 57 to take up any possible slack in the sprocket chain. The shaft 58, upon which are mounted the drum and the sprocket 34, is fixed. so as to moved around in the tracks 30 as the frame 27 is rotated in the tracks 29.

The operation of my device is as follows: A mirror having been attached to the support by operation of the handle 25 to create a vacuum to hold the mirror 26 against the support 20,, the frame 27 is rotated on the tracks 29 and 30 so as to bring the stone or grinding surface 46 into contact with the mirror to be beveled. Power from any suitable source is provided, the power rotating the shaft 13 through drum 5, shaft 4, sprocket 6, chain 7, sprocket 8 to operate shaft 3 and sprocket 9, sprocket-chain 10 and sprocket 11 to operate shaft 3*. The cams 2 are rotated so as to move the shaft 13 back and forth in its bearings, as shownin Fig. 4.

The shaft 13 is rotated by means of the shaft '4, sprocket 16, sprocket chain 15, sprocket 14 fixed on shaft 13. As the mirror is rotated the reciprocating motion tends to keep the edge of the mirror, which is being ground, in constant contact, at a given point, with the grinding stone. Simultaneously with the operation of the mirror-supporting apparatus, the grinding stone is rotated and given a vertical reciprocating motion so as to bring different parts of the grinding stone .in contact with the mirror or glass, or other object being treated. This operation is as follows The shaft 58 being operated by any suitable source of power, sprocket 34 is rotated, transmitting power to Sprocket chain 35 to sprocket 40,-rotating shaft 37. Shaft 37 rotates sprocket 36 which, through sprocket chain 36*, rotates sprocket 41 on shaft 29 having the two upper eccentrics 28. Rotation of shaft 29 rotates sprocket 42, causing rotation of sprocket 44 through sprocket chain 43, sprocket chain 44 rotating shaft 30, whereby the two lower cams 28, 28 are rotated so as to give the vertical reciprocating motion to shaft 32. The rotation of shaft 37 rotates sprocket 59, transmitting motion to sprocket 60 "by sprocket chain 61 so as to rotate shaft 22, causing the grinding stone 46 to be rotated.

Simultaneously with this operation, the support 28 is moved back and forth on the tracks 48 by the cams 49 so as to keep the grinding stone in constant contact with the mirror or glass to be beveled. I have found that in operation on an oval mirror, there is a tendency on the part of the; mirror to draw awayfrom the grinding stone. at four pointsthat is, it dra'ws away a little as the mirror assumes, 'inits rotation, a posi ror is slightly drawing away from or slightly approaching the grinding stone, and to compensate for this, I have provided means for moving the grinding stone to- .ward and away from the mirror by the cams 49.

As the mirror or glass is beveled or polished, the apparatus carrying the mirror is'moved to compensate for the amount of the glass or mirror that has been removed by the grinding stone.

The frame 1 is provided with cross-members 74, 7 4, through which pass bolts 71, pro- .vided with nuts 72 on the lower sideof the foundation support 70. This foundation support 70 is provided with grooves 73 or passages to permit the .frame 1 to he moved ack and forth. This movement of the frame is provided for by rotating the wormshaft 75, mounted in bearings 77, 77, fixed to the lower side of the foundation support 7 0. 7 6 is a member fixedto the cross-memhere 74, 745 of the frame 1 and provided with a threaded. portion engaging with the worm on the shaft 7 5, so that the rotation of the shaft 75 causes the frame 1 to be -moved back and forth in the grooves of the support 70 to regulate the distance of the mirror or glass to be beveled from the grinding surface. 78 is a wheel fixed to the shaft 75 to rotate same.

Having described my invention, what I- &

for moving said shaft back and forth in said openings.

2. In a glass-beveling apparatus, glasssupporting means, glass-grinding means, a frame for said grinding means rotatively mounted upon a ,earriage so as to regulate the angle of contact between the glassgrinding means and the glass to be beveled and means for moving said carriage so as to maintain said grinding means in constant contact with the glass to be beveled.

3. In a glass-beveling apparatus, a frame, horizontal bearings 3 said frame, a shaft mounted in said beafngs, means for moving said shaft back at forth in said bearings, means for rotating said shaft, a glasssupport mounted on said shaft means for holding a glass on said support.

4:. In a glass-beveling apparatus, a frame, horizontal bearings in said frame, a shaft mounted in said bearings, means for moving said shaft back and forth in said bearings, means for rotating said shaft, a glasssupport mounted on said shaft, means for holding a glass on said support, glassgrinding means, a frame for said glassgrinding means, means for rotating said grindingmeans and means for moving said grinding means to maintain constant 0011- tact between the glass and the grinding means. a

5. In apparati'ls for beveling oval mirrors, a mirror-support, having a horizontal reciprocating motion. a supporting shaft therefor, a glassgriuding surface provided with a vertical reciprocating motion and means for rotating said glass-support and said grinding means.

In testimony whereof I have signed my name to this specification.

FREDERICK A. ANTONGICH. 

